linktypes.php

<?php

//////////////////////////////////////////////////////////////
//
//    Copyright (C) Thomas Kock, Delmenhorst, 2008, 2009
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with this program; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
// http://www.gnu.org/copyleft/gpl.html
//
//////////////////////////////////////////////////////////////

if (!defined('MEDIAWIKI'))
die();

// Translate links
$wgHooks['InternalParseBeforeLinks'][] = 'fchw_ParseLinks';
// Each page save - store relations for current page
$wgHooks['LinksUpdateConstructed'][] = 'fchw_UpdateLinks';
// Delete page - delete relations
$wgHooks['ArticleDelete'][] = 'fchw_DeleteLinks';
// Move page - move relations
$wgHooks['TitleMoveComplete'][]='fchw_MoveLinks';
// Undelete page - recreate relations
$wgHooks['ArticleUndelete'][] = 'fchw_UndeleteLinks';

global $fchw;
$fchw['ParseLinks'] = 1;

// parse links when displaying page
function fchw_ParseLinks(&$parser, &$text) {
    global $fchw;
    if ($fchw['ParseLinks'] == 0)
    return true;
    $output = "";
    $lastch = "";
    $LinkStarted = false;
    $Len = strlen($text);
    for($i=0; $i<$Len; $i++) {
        $ch = $text[$i];
        if (($ch == "[") && ($lastch == "[")) {
            $LinkStarted = true;
            $LinkText = "";
        }
        if (($ch == "]") && ($lastch == "]")) {
            $LinkStarted = false;
            if (strpos($LinkText, "::") > 0) {
                $Relation = substr($LinkText, 1, strpos($LinkText, "::")-1);
                $LinkTmp = substr($LinkText, strpos($LinkText, "::")+2, -1);
                $output .= "[$LinkTmp|$Relation::$LinkTmp]";
            } else {
                $output .= $LinkText;
            }
        }
        if ($LinkStarted)
        $LinkText .= $ch;
        else
        $output .= $ch;
        $lastch = $ch;
    }
    $text = $output;
    return true;
}

// each save - fill relations table for current page
function fchw_UpdateLinks($linksupdate) {
    global $wgDBprefix;
    global $fchw, $wgParser;
    if ($fchw['ParseLinks'] == 0)
    return true;
    $fchw['ParseLinks'] = 0;
    $options = new ParserOptions();
    $title = Title::newFromID($linksupdate->mId);
    if (($title === NULL)) continue;
    $revision = Revision::newFromTitle($title);
    if ($revision === NULL) continue;
    $parserOutput = $wgParser->parse($revision->getText(), $title, $options, true, true, $revision->getID());
    $linksupdate = new LinksUpdate($title, $parserOutput);
    $linksupdate->doUpdate();

    $fchw['Pages'] = fchw_GetPages();
    $fchw['dbr'] = &wfGetDB(DB_SLAVE);
    $fchw['table_relation'] = $fchw['dbr']->tableName('fchw_relation');
    // <patch by Gerrit I.>
    //$sql = "delete from ".$fchw['table_relation']." where from_title like '".$fchw['dbr']->strencode($linksupdate->mTitle->mPrefixedText)."'";
    //$From_title = $linksupdate->mTitle->mPrefixedText;
    $From_title = $linksupdate->mTitle->getPrefixedText();
    if (strrpos($From_title, ":") > 0)
      $From_title = substr($From_title, strpos($From_title, ":")+1);
    $sql = "delete from ".$fchw['table_relation']." where from_title like '".$fchw['dbr']->strencode($From_title)."'";
    // </patch by Gerrit I.>
    $res = $fchw['dbr']->query($sql);
    $cnt = 1;
    foreach($linksupdate->mLinks as $Key2=>$Value2) {
        foreach($Value2 as $Key=>$Value) {
            fchw_SaveLink($linksupdate, $Key);
            $cnt++;
        }
    }
    $fchw['ParseLinks'] = 1;
    return true;
}

// Delete links when deleting page
// added &$error for compatibility reasons with calling function.
function fchw_DeleteLinks(&$article, &$user, &$reason, &$error) {
    global $fchw;
    global $wgDBprefix;
    $fchw['dbr'] = &wfGetDB(DB_SLAVE);
    $fchw['table_relation'] = $fchw['dbr']->tableName('fchw_relation');
    $sql = "delete from ".$fchw['table_relation']." where from_id = '".$article->getID()."'";
    $res = $fchw['dbr']->query($sql);
    return true;
}

// Move links when moving page
function fchw_MoveLinks(&$title, &$newtitle, &$user, $oldid, $newid) {
    global $fchw;
    global $wgDBprefix;
    $fchw['dbr'] = &wfGetDB(DB_SLAVE);
    $fchw['table_relation'] = $fchw['dbr']->tableName('fchw_relation');
    $fchw['Pages'] = fchw_GetPages();
    $fchw['dbr']->update($fchw['table_relation'],
        array('from_title' => $newtitle),
        array('from_title' => $title),
       'fchw_MoveLinks');
    $fchw['dbr']->update($fchw['table_relation'],
        array('to_title' => $newtitle),
        array('to_title' => $title),
       'fchw_MoveLinks');
    //die ("$title, $newtitle, $oldid, $newid");
    return true;
}

// Undelete links when un-deleting page
function fchw_UndeleteLinks($title, $create) {
    global $fchw;
    global $wgDBprefix;
    $fchw['dbr'] = &wfGetDB(DB_SLAVE);
    $fchw['table_relation'] = $fchw['dbr']->tableName('fchw_relation');
    $fchw['Pages'] = fchw_GetPages();
    $fchw['dbr']->update($fchw['table_relation'],
        array('to_id' => $fchw['Pages']["$title"]),
        array('to_title' => $title),
       'fchw_UndeleteLinks');
    return true;
}

// Save link - save relation to database
function fchw_SaveLink($linksupdate, $Link) {
    global $fchw;
    if (!isset($fchw['RedirectedPages']))
    $fchw['RedirectedPages'] = fchw_GetRedirectedPages();
    if (strpos($Link, "::") > 0) {
        $Relation = substr($Link, 0, strpos($Link, "::"));
        $To_title = substr($Link, strpos($Link, "::")+2);
        $To_id = 0;
        //$From_title = $linksupdate->mTitle->mPrefixedText;
        $From_title = $linksupdate->mTitle->getPrefixedText();
        if (strrpos($From_title, ":") > 0)
        $From_title = substr($From_title, strpos($From_title, ":")+1);
        if (strrpos($To_title, ":") > 0)
        $To_title = substr($To_title, strpos($To_title, ":")+1);
        if (isset($fchw['Pages'][$To_title]))
        $To_id = $fchw['Pages'][$To_title];
        // REDIRECTED pages
        if (isset($fchw['RedirectedPages'][$To_id])) {
            $To_title = $fchw['RedirectedPages'][$To_id]['to_title'];
            $To_id = $fchw['RedirectedPages'][$To_id]['to_id'];
        }
        //
        $fchw['dbr']->insert($fchw['table_relation'],
            array(
            'from_id' => $linksupdate->mId,
            'from_title' => $From_title,
            'to_id' => $To_id,
            'to_title' => $To_title,
            'relation' => $Relation
            ), 'fchw_SaveLink');
    }
    return true;
}